BBR Clutch Springs - CRF50 Finishing Touches Increased the skirt height and

Increased the skirt height and size on the lightweight high compression 64mm piston with rings

This is an affordable kit that will convert your TB 88cc Race Head kit into a powerful open class 108cc engine (much more powerful than the common Chinese 107 and 125cc engines)

Lightweight high compression domed 64mm piston with rings

The kit includes an all aluminum ceramic plated 64mm cylinder which will increase your engine displacement to 165cc

and its preset from the factory to run perfectly out the box for most conditions

BBR Clutch Springs - CRF50 Finishing Touches Increased the skirt height andCRF XR50 Clutch Springs Heavy duty springs help prevent clutch slippage in high performance CRF XR50 motors. Custom wound from chrome silicon wire Preset for long life Higher spring seat pressure to resist clutch slippage A "Must Have" for big bore CRF XR50s